Hȳ-pĕr'bo-loid, n.

n. [Fr. hyperboloïde, from hyperbole, Eng. hyperbola, and Gr. εἶδος, form.] (Geom.) An hyperbolic conoid; a solid formed by the revolution of an hyperbola about its axis; a surface or solid whose plane sections are either ellipses or hyperbolas. Math. Dict.